When you get your emails for the license keys, you find the key inside in clear text. Also we provide a function call to register with clear text and one with a bit of encoding. So you can just add those to your app.open event and be happy:

Of course the standard encoding is very easy to break and when a key is leaked on the usual sites on the Internet, we have to block it. So please hide the keys a bit and help to make sure your key isn't going to be blocked.
For LibXL you get keys per platform. You may not need all variants, but for those you use, please include the key like above.
15 09 16 - 13:07